Urgent Attention

I upgraded my tablet Samsung galaxy note 8.0 WiFi only after which the muilti window, (multiple widgets, shortcuts, wake up in lock screen, set wakeup command from setting under lockscreen) were disabled and sometimes the touch screen will not work until I use the styl pen. All these problems were not there before the upgrade. PLEASE WHAT CAN I DO?

*For doing soft reset or restart SAMSUNG GALAXY NOTE 8 GT-N5100 (510), press and hold the POWER BUTTON until LCD appear menu to restart or turning off. Choose Reboot or Restart then the SAMSUNG GALAXY NOTE 8 GT-N5100 (510) will doing the soft reset. This is safe because the process will not erase or wipe any important data.